These build records can really tell a story. Looks like there were probably two orders, one shipped in April in four parts (4 canoes), and the other in June (2 canoes):
Order Shipped Built Serial No.
5199 4/21/71 4/70 184739
5199-B 4/22/71 3/70 184380
5199-B 4/26/71 3/70 184432 (probably really order "5199-C")
5199-D 4/28/71 1/70 184310
5839 6/8/71 4/70 183635
5839 6/8/71 1/70 184314
All the canoes were completed a year or more earlier, so it's not construction that delayed shipment of the last two. Wonder if the first four turned out not to be enough after multiple rounds of wrecking them in the Chattooga while trying to get the perfect shot.